China Black Steel Pipe Product Description Black Mild Steel Pipe / Tube is a dual certified to EN BS 10255 and BS EN 10217-1 available cut to any size you need. Black iron pipe is mild low carbon steel so it can be welded to most grades of steel. Water and natural gas are transported using black steel pipe from their origins to residences and commercial buildings. Black pipe's great resistance to heat makes it a popular choice for fire sprinkler systems. Product Specification Chemical composition and mechanical properties at room temperature Chemical composition (Ladle)Mechanical properties at room temperature C Max.Mn Max.P Max.S Max.Tensile Strength, RmYield Strength, Re (min.)Elongation on Gauge Length L0 = 5.65 S0 A (min.) %%%%N/mm2N/mm2% 0.21.20.0450.045320 to 46019520 Outside DiameterWall Thickness INCHDNmmmm 1/2"1520-21.30.95-2.77 3/4"2025-26.91.1-2.87 1"2532-33.71.1-4 1-1/4"3240-42.41.1-4 1-1/2"4047-48.31.5-7 2"5058-60.31.8-7 2-1/2"6573-76.12.0-7 3"8087-88.92.2-8 4"100113-114.32.2-9 5"125140-141.32.5-10 6"150165-168.32.5-10 8"200216-219.12.75-12 Strict Quality Control 1) During and after production, 4 QC staffs with more than 5 years experience inspect products in random. 2) National accredited laboratory with CNAS certificates 3) Acceptable inspection from third party appointed/paid by buyer, such as SGS, BV. 4) Approved by Malaysia, Indonesia, Singapore, Philippines, Australia, Peru and UK. We own UL /FM, ISO9001/18001, FPC certificates.China Black Steel Pipe website:http://www.youfaconstruction.com/carbon-steel-pipe/black-steel-pipe/